Concrete mixer



L. LUND. CONCRETE MIXER- FILED FEB. 25. I922. 2 SHEETSSHEE-T I INVENTOR LEVI Lil/VD.

Patented Dec. 19, 1922.

PATENT OFFlGE.

LEVI LUND, OF GRAND FORKS, NORTH DAKOTA, ASSIGNOR OF ONE-HALF TO EMIL PETERSON, OF EAST GRAND FORKS, MINNESOTA.

CONCRETE MIXER.

v I Application filed February 25, 1922. Serial No. 539,243.

To oZZ wiwmit may concern:

Be it known that I, LEVI LUND, a citizen of the United States, residing at Grand crete Mixers; and I do hereby declare the following to be a full, clear, and exact defor rotating and tilting the same.

vscription of the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to a mixing device, particularly designed for mixing concrete. The device is ofthe type having a revoluble vessel in which the materials to be mixed are charged, and which vessel is arranged to be tilted to discharge the material. The device 1s also mounted on a truck frame so as to be especially convenient for use in road work, and to be readily transportable.

It is an object of the invention to provide such a mixer with simple and efficient means It is a further object to mount the mixing container on a frame, together with a motor and to provide simple and eflicient transmission mechanism for rotating the vessel and for controlling and operating the tilting mechamsm.

These and other objects of the invention will fully appear from the following. de-

scription made in connection with the ac- Referring to the drawings, the device comprises a frame member 1 having longitudinal 'side members and supporting end members,

which frame is mounted upon suitable truck wheels at the front and rear thereof. The

side members of the frame are preferably inthe form of angle bars and to. the front ends of the horizontal portions thereof are secured apair of brackets 2 shown as of late material having their ends upturned to orm bearings for transversely extending cylindrical rods 3. These rods are flattened at their inner ends and bolted or otherwise suitably secured to the front end of a fiat ring member 4. A U-shaped member 5 formed of a flat metal strip has its ends outturned and bolted to the inside of the ring 4 and extends rearwardly longitudinally of the frame. The ring member 4 has a second plate 6 bolted thereto and spaced therefrom at its lower portion which is semi-circular in shape. .Rollers 7 are rotatably mounted on members extending between and secured to the plates 4 and 6 and these rollers form the forward support for a substantially cylindrical vessel or barrel 8, which has projecting from its rear end 'a, short axle shaft 9 journaled in an aperture formed in the rear part of the member 5, which shaft has suitable collars secured thereto at each side of the member 5 to hold the same in correct position. A plate member 10 is bolted to the rear portion of the member 5 and extends downwardly therefrom and is connected to a curved flat bar 11 which extends forwardly under the barrel 8 and is connected at its front end to the members 6 and 7 A crank shaft 12 isjournal'ed at its ends in bearings secured to" the side members of the frame 1 and this shaft has a roller 13 journaled on its crank portion upon which the plate 11 rests. This crank shaft is provided at one side of the frame with a'large gear 14 driven by a pinion 15 secured to a short shaft supported on the side member, to which shaft is also secured a comparatively, larger gear 16 which is, in turn, arranged to mesh with and be driven by a pinion 17 'The latter pinion is mounted on a shaft 18 extending between the side members of the frame and supported in bearings thereon and this shaft is arranged to be driven .by a sprocket wheel 19 over which runs achain 20 driven bya sprocket 21, which sprocket is secured to the crank shaft 22 ofa suitable motor 22? mounted on the frame 1 diagrammatically illustrated as of the internal combustion engine type. The pinion 17 is loosely mounted .on the shaft 18 and. is formed to constitute-one member of a clutch, the other member 23 of which is splined on the shaft 18 and is normally held out of engagement with the pinion 1 by a coiled compression spring 24 housed therein. A clutch lever 25 is pivoted at one 7 thereof somewhat flattened and arranged to bear against the side of a cam disk 27 secured to the crank shaft 12. This cam j the shaft 18.

disk has a sector shaped portion thereof separated by a slit from the main body of the cam and bent laterally, as shown in Figs. 2 and 4. A flexible member or cable 35 is shown as secured to the lever 25 adjacent This cable passes laterally over a pulley 36 secured to one of the side members of the frame and this cable then passes forwardly along said side member and over another pulley mounted at the end of the frame. This cable is adapted to be used as manipulating means for the lever 25.

In order to rotate the container 8 the sprocket 19 is formed to constitute one member of a clutch and the other sprocket 28 is splined on the shaft 10 to slide thereon and to be moved into engagement with the sprocket'19 and clutch the same so as to be driven thereby, the sprocket 28 being moved,

as desired, by a clutch lever 29 provided with the usual clutch fork engaging in a groove therein. A shaft 30 is journaled at one end of the frame in bearings secured to one of the side members and the member 5 and carries a sprocket over which isadapted to run a chain 31 driven by a sprocket 28. The shaft 30 has'a beveled gear at one end meshing with another beveled gear secured to a shaft 32 mountedin bearings bolted to one side of the member 5. This shaft 32 has secured to its rear end a spur pinion 33 which meshes with a larger annular gear 34 secured to and surrounding the rear end of the member 8. It will be. noted that the member 8 is provided with apart 8 forminga convenlent discharge lportion. The member 8 is also provided on its interior with suitable mixing blades not shown.

With the above structure, when the motor 23 1s operated the shaft 18 will be driven and fwhen it is desired to rotate the.member 8,

after the material has been charged therein, the clutch lever 29 will be thrown to connect sprockets 19 and 28. The member 8 will then be rotated through the shafts 30 and 32 by pinion 33 turning the gear 34. At thls time, the barrel or container 8'will occupy substantially the position shown-in Fig. 1'. 'When the material has been sufficiently mixed and it is desried to. discharge the same, the operator, who will usually be at the front of the machine, will pull. upon -the container is in this position.

clutch members, as stated, the end of the lever will be brought to one side'of the cam 27, as shown in Fig. 2. When the members 23 and 17 are engaged, thecam 27 immediately begins to revolve and the flat portion of the cam soon passes across the end of the lever and this end of the lever then bears against the fiat portion of the cam and the clutch is held in engagement for substantially one revolution of the crank shaft12. As the crank shaft revolves, the roller 13 is moved from the position shown in full lines in Fig. 1 to the position shown in dotted lines and the barrel 8 is, likewise, moved into the position shown in dotted lines in said figure. The materialv will thus be discharged as A continued rotation of the crank shaft again allows members 13 and 11 and the container 8 to resume their normal position. When this position is again attained, the end of the lever 25 has reached the bent-out sector on the cam 27 and will again move toward the center of the frame in contact with the edge of said sector. This will allow the members 23 and 17 to disengage and the container 8 will be rotated without the crank shaft 12 revolving until the cable 35 is again. pulled to engage the members ,23 and 17.

The shaft 18 is shown with a squared end to receive a handle crank, so that the shaft can be turned by hand and-the member 8 discharged when the engine is not running.

From the above description it is seenthat applicant. has provided a simple and efficient construction of concrete mixer. The transmission parts are few and simple and the rotation and tilting movement of the mixing vessel are easily controlled. It will be noted that the rotating transmission mechanism is located adjacent one side member of the frame and the tilting transmission mechanism is located adjacent the other side member. The shafts for supporting the mechanisms are thus easily mounted on the side frame members' The machine can be 120 constructed of material which is easily obtainable in standard shapes and the structure is quite rugged and has no tendency to become disarranged. With the device, the concrete can be quickly and efliciently mixed and can be discharged readily when desired at the required location.

tail and. arrangement of the parts without departing from the scope of applicants invention, which, generally stated, consists in the matter shown and described and set forth in the appended claims.

What is claimed is:

1. A concrete mixer having in combination, a frame, a rotatable vessel mounted therein, said frame and vessel being arranged for tilting movement about a trans-,

verse axis, a member extending longitudinally from one end thereof, rotating a crank member adapted to engage said member to tilt the vessel, and transmission means having a common actuator for rotating said vessel and crank member.

2. A concrete mixer having in combination, a frame, a substantially cylindrical vessel mounted for rotation about a longitudi nal axis and fortilting movement therewith about a transverse axis atone end thereof,

said vessel being closed at one end and having a charging and discharging opening at .naled in said'frame and adapted to co-act with said member to tilt the vessel. a power shaft on said frame, driving means for said crank shaft, a clutch for connecting said driving means to said power shaft, a lever for operating said clutch, and means on said crank shaft for holdin said lever in position to hold said clutc engaged for substantially one revolution of said crank shaft whereby the vessel is tilted upwardly and downwardly.

4. Thecombination set forth in claim 3,

ble disk cam.

5. The structure set forth in claim 4, said cam having a sector thereof bent laterally and spaced at one radial edge from the body of said cam.

6. The structure 'set forth in claim 3 and a flexible means secured to said lever and extending to the front of the frame and forming a manipulating means for said lever.

7. A concrete mixer having in combination, a stationary frame comprising spaced side members, a tilting frame, a substantially cylindrical container mounted on one end of said latter frame for rotation about a longitudinal axis and for tilting movement therewith about an axis extending transversely at the end of the frame, a power means on said frame, a crank shaft on said frame carrying a cam roller for tilting said container, transmission means secured to said tilting frame with which said roller engages, mechanism for rotating said containeradapted to be connected to said power therefor carrying a revoluble containel},

means for tilting said means comprising a rotating crank shaft; means for. re-volvlng said container including a clutch, and means for holding said clutch en aged for substantially one revolution of said crank shaft and then permitting said clutch to be released.

9. The structure setforth in claim.8, said last named means comprising a lever for operating said clutch, and a slotted cam disk on said. crank shaft co-operating with said lever. v I

In testimony whereof'I aflix my signature.

LEVI LUND.

means, and located adjacent one of the side I 

